Two magnetic impurities in graphene

ORAL

Abstract

We theoretically investigate two magnetic impurities in graphene. We mainly study the indirect interaction between the two magnetic impurities mediated by conducting electrons, which is so called RKKY interaction. The spin-spin and charge-charge correlation functions are calculated by quantum Monte Carlo simulations when the Fermi energy of the system is changed by gate voltage. The spectral density of the two impurities is also studied by maximum entropy methods.

*We thank the CSC in Finland for computer resources.

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Authors

  • F.M. Hu

    • Aalto University, School of Science, Finland
    • COMP/Department of Applied Physics, Aalto University, School of Science and Technology

  • Jame Gubernatis

    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA

  • Hai Qing Lin

    • Beijing Computational Science Research Center
    • Beijing Computational Science Research Center, Beijing, China and The Chinese University of Hong Kong, Hong Kong, China
    • The Chinese University of Hong Kong
    • Department of Physics, The Chinese University of Hong Kong

  • Risto Nieminen

    • Department of Applied Physics, Aalto University, P.O. Box 11100, FI-00076 AALTO, Finland
    • Aalto University, School of Science, Finland